EP2479017B1 - Method for applying strips of material from an unvulcanised raw rubber mixture to a tyre construction drum - Google Patents

Method for applying strips of material from an unvulcanised raw rubber mixture to a tyre construction drum Download PDF

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Publication number
EP2479017B1
EP2479017B1 EP11191861.1A EP11191861A EP2479017B1 EP 2479017 B1 EP2479017 B1 EP 2479017B1 EP 11191861 A EP11191861 A EP 11191861A EP 2479017 B1 EP2479017 B1 EP 2479017B1
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EP
European Patent Office
Prior art keywords
tyre
nozzle
building drum
tube
raw rubber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11191861.1A
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German (de)
French (fr)
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EP2479017A1 (en
Inventor
Ulrich Geffert
Patrick Elsen
Stephan Meyer
Frank Steiner
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Continental Reifen Deutschland GmbH
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Continental Reifen Deutschland GmbH
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Publication of EP2479017A1 publication Critical patent/EP2479017A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/30—Applying the layers; Guiding or stretching the layers during application
    • B29D30/3028—Applying the layers; Guiding or stretching the layers during application by feeding a continuous band and winding it helically, i.e. the band is fed while being advanced along the drum axis, to form an annular element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
    • B29B7/7495—Systems, i.e. flow charts or diagrams; Plants for mixing rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
    • B29C48/37—Gear pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
    • B29D30/58—Applying bands of rubber treads, i.e. applying camel backs
    • B29D30/62—Applying bands of rubber treads, i.e. applying camel backs by extrusion or injection of the tread on carcass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/387—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a gear pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
    • B29D30/16—Applying the layers; Guiding or stretching the layers during application
    • B29D2030/1664—Details, accessories or auxiliary operations not provided for in the other subgroups of B29D30/00
    • B29D2030/1678—Details, accessories or auxiliary operations not provided for in the other subgroups of B29D30/00 the layers being applied being substantially continuous, i.e. not being cut before the application step
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
    • B29D2030/481—Fillers or apexes

Definitions

  • the invention relates to a method for applying strips of material from an unvulcanized raw rubber mixture on a tire building drum for the production of vehicle tires.
  • the invention is based on the object, a method and an apparatus for applying strips of material from an unvulcanized crude rubber mixture a tire building drum, can be easily applied with the thin strip of material at any position on the tire carcass.
  • the object is achieved by a method according to claim 1.
  • the invention allows the production of a high quality strip of material that can be easily wound onto the tire building drum.
  • strips with small cross-sections and particularly low heights can be reliably manufactured and wound up.
  • the inventive method and the device according to the invention also allow a flexible arrangement of the raw rubber strip on the tire carcass or the tire building drum.
  • the space requirement of the device according to the invention is low, since the entire device of extruder, gear pump, hose and nozzle in the longitudinal and transverse directions is movable. The short distance between the nozzle and the green tire also improves the quality of the material strip produced.
  • the tube can be moved arcuately from 0 to at least 120 degrees, preferably up to 90 degrees in the horizontal in both directions. Due to this flexible arrangement of the hose, the nozzle at any point of the green tire, even on the side walls, hang up material without the need to reposition the entire process arrangement with a lot of effort.
  • the flexible hose also requires only a small space.
  • the hose will withstand a pressure of at least 800 bar.
  • the raw rubber mixture is forced through the nozzle at high pressure. Therefore, the hose must withstand these high loads.
  • the hose is provided with a reinforcement, for example of a woven metal reinforcement. This makes the hose more stable and can be loaded with a higher pressure.
  • a gear pump is used to generate the high working pressure in the raw rubber mixture.
  • a particular advantage of using a gear pump is that it compensates for the pulsation of the extrusion.
  • the uneven flow of material from the extruder is smoothed by the use of a gear pump and allows a uniform flow of raw rubber mass into the hose.
  • the entire device of extruder, gear pump, hose and nozzle in the longitudinal and transverse directions is movable. This makes it possible without much effort to place the strips of material anywhere on the tire carcass.
  • the nozzle has a slot-shaped opening on the hose. This can produce a very thin strip of material, e.g. essential for the accurate production of the tire contour.
  • the tire building drum is stationary and is only moved rotationally. This allows the strip of material to be spooled onto the tire carcass at a high speed.
  • the produced material strip has a thickness of 0.2-1.5 mm, preferably about 0.7 mm and a width of 5-15 mm. With the thin strips of material, the manufacturing quality of vehicle tires can be significantly improved.
  • the tire building drum has a segmented core, wherein the core simulates the Reifenholraum the green tire on its outside.
  • the segmented core provides optimal support for the tire carcass on the material strips to be wound up. It is also conceivable to implement the helical winding on a cambered carcass, which is arranged for example on a Nutspannkopf.
  • the figures show a device for applying strips of material from an unvulcanized raw rubber compound on a tire building drum for the production of vehicle tires.
  • the FIG. 1 shows the device in side view.
  • the device comprising extruder 1, gear pump 2, flexible hose 3 and nozzle 4 is arranged on a platform 5.
  • the raw rubber compound or crude rubber mixture is provided by an extruder 1.
  • the raw rubber mass of the gear pump 2 is supplied.
  • a high working pressure is generated in the raw rubber mixture and the uneven flow of material generated by the extruder 1 compensated. Due to the high working pressure, the raw rubber mass is pressed into a flexible hose 3.
  • a material strip is produced via a nozzle 4 and onto the tire building drum, which only moves rotationally and on which a tire carcass has already been applied in advance.
  • the tire carcass is disposed on a tire building drum, the tire building drum having a segmented core, wherein the core on its outside mimics the tire cavity of the green tire.
  • Fig. 2 and Fig. 3 show the device for winding strips of material in the supervision.
  • the dashed line shows in position 7 the maximum deflection of the hose to both directions in the horizontal, which lies in the sheet plane.
  • the device for applying strips of material is shown in a position which makes it also possible to apply strips of raw rubber to the sides of the tire carcass.
  • the platform 5 is thereby moved to the extent required in the longitudinal and transverse directions X and Y.
  • the flexible hose 3 is brought to the desired position on the tire carcass 6. Due to the possibility not only to change the platform 5 in position, but also to be able to flexibly arrange the hose 3, only a small installation space is required for the complete device.
  • a longitudinally and transversely displaceable platform 5 and a flexible hose 3 can be achieved by a few Changes in position at each point on the tire carcass to wind up corresponding tire components, such as the apex, the rim strip, the sidewall or the tread.

Description

Die Erfindung betrifft ein Verfahren zum Applizieren von Materialstreifen aus einer unvulkanisierten Rohgummimischung auf einer Reifenaufbautrommel zur Herstellung von Fahrzeugreifen.The invention relates to a method for applying strips of material from an unvulcanized raw rubber mixture on a tire building drum for the production of vehicle tires.

Nach den bekannten Verfahren und mit den bekannten Vorrichtungen zum Aufspulen eines Materialstreifens aus einer Rohgummimischung wird eine vorerst extrudierte Rundschnur mittels eines Kalandrierprozesses in eine geometrisch definierte Form gebracht. Der derart hergestellte Materialstreifen wird mittels einer Belegerolle auf einen Reifenrohling aufgespult. Die Erfahrung zeigt, dass bei den bekannten Verfahren in Abhängigkeit von der Temperatur, der Viskosität der Gummimischung und dem Betriebszustand (Starten, Stoppen) die Geometrie des in der Kalandriereinrichtung hergestellten Materialstreifens schwankt. Ein weiterer Nachteil ist, dass durch die Kalandriereinrichtung ein großer Bauraum beansprucht wird und die Anordnung nur durch einen hohen Aufwand in Ihrer Position zur Reifenaufbautrommel verfahrbar ist.After the known methods and with the known devices for winding a strip of material from a raw rubber mixture a initially extruded round cord is brought by means of a calendering process in a geometrically defined shape. The material strip produced in this way is wound on a green tire by means of a blank roll. Experience shows that in the known processes, depending on the temperature, the viscosity of the rubber compound and the operating state (starting, stopping), the geometry of the strip of material produced in the calendering device varies. Another disadvantage is that a large space is claimed by the calender and the arrangement is movable only by a lot of effort in your position to the tire building drum.

Andere bekannte Verfahren zur Herstellung von Reifenrohlingen sind in der EP 1418043 A2 , DE 297 20 892 U1 , WO 2005/ 021634 A1 , US 6 112 848 A , DE 43 15 469 A1 , US 2005/ 161163 A1 , EP 2338662 A1 offenbart.Other known processes for the production of green tires are in the EP 1418043 A2 . DE 297 20 892 U1 . WO 2005/021634 A1 . US 6,112,848 A . DE 43 15 469 A1 . US 2005/161163 A1 . EP 2338662 A1 disclosed.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zum Applizieren von Materialstreifen aus einer unvulkanisierten Rohgummimischung auf einer Reifenaufbautrommel zu schaffen, mit dem dünne Materialstreifen an beliebiger Position an der Reifenkarkasse einfach aufgetragen werden können.The invention is based on the object, a method and an apparatus for applying strips of material from an unvulcanized crude rubber mixture a tire building drum, can be easily applied with the thin strip of material at any position on the tire carcass.

Die Aufgabe wird durch ein Verfahren nach Anspruch 1 gelöst.The object is achieved by a method according to claim 1.

Die Erfindung gestattet das Herstellen eines qualitativ einwandfreien Materialstreifens, der auf einfache Weise auf die Reifenaufbautrommel aufgewickelt werden kann. Es können außerdem Streifen mit kleinen Querschnitten und besonders geringen Höhen prozesssicher hergestellt und aufgespult werden. Das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung ermöglichen zudem eine flexible Anordnung der Rohgummistreifen auf die Reifenkarkasse beziehungsweise die Reifenaufbautrommel. Der Platzbedarf der erfindungsgemäßen Vorrichtung ist gering, da die gesamte Vorrichtung aus Extruder, Zahnradpumpe, Schlauch und Düse in Längs- und Querrichtung bewegbar ist. Der kurze Abstand zwischen Düse und Reifenrohling verbessern außerdem die Qualität des hergestellten Materialstreifens.The invention allows the production of a high quality strip of material that can be easily wound onto the tire building drum. In addition, strips with small cross-sections and particularly low heights can be reliably manufactured and wound up. The inventive method and the device according to the invention also allow a flexible arrangement of the raw rubber strip on the tire carcass or the tire building drum. The space requirement of the device according to the invention is low, since the entire device of extruder, gear pump, hose and nozzle in the longitudinal and transverse directions is movable. The short distance between the nozzle and the green tire also improves the quality of the material strip produced.

Bei einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens kann der Schlauch bogenförmig von 0 bis mindestens 120 Grad, vorzugsweise bis 90 Grad in der Horizontalen in beide Richtungen bewegt werden. Durch diese flexible Anordnung des Schlauches kann die Düse an jeder beliebigen Stelle des Reifenrohlings, auch auf den Seitenwänden, Materialstreifen auflegen ohne das dazu mit einem hohen Aufwand die gesamte Verfahrensanordnung neu positioniert werden muss. Durch den flexiblen Schlauch wird außerdem nur ein geringer Bauraum beansprucht.In a preferred embodiment of the method according to the invention, the tube can be moved arcuately from 0 to at least 120 degrees, preferably up to 90 degrees in the horizontal in both directions. Due to this flexible arrangement of the hose, the nozzle at any point of the green tire, even on the side walls, hang up material without the need to reposition the entire process arrangement with a lot of effort. The flexible hose also requires only a small space.

Es ist vorgesehen, dass der Schlauch einem Druck von mindestens 800 bar standhält. Die Rohgummimischung wird mit einem hohen Druck durch die Düse gepresst. Deswegen muss auch der Schlauch diesen hohen Belastungen standhalten.It is envisaged that the hose will withstand a pressure of at least 800 bar. The raw rubber mixture is forced through the nozzle at high pressure. Therefore, the hose must withstand these high loads.

Es ist vorgesehen, dass der Schlauch mit einer Verstärkung, z.B. aus einer gewebten Metallarmierung, versehen ist. Dadurch wird der Schlauch stabiler und kann mit einem höheren Druck belastet werden.It is envisaged that the hose is provided with a reinforcement, for example of a woven metal reinforcement. This makes the hose more stable and can be loaded with a higher pressure.

In einer weiteren vorteilhaften Weiterbildung ist vorgesehen, dass zum Erzeugen des hohen Arbeitsdruckes in der Rohgummimischung eine Zahnradpumpe verwendet wird. Besonders Vorteilhaft bei der Verwendung einer Zahnradpumpe ist, dass diese die Pulsation des Extrudes kompensiert. Der ungleichmäßige Materialfluss aus dem Extruder wird durch den Einsatz einer Zahnradpumpe geglättet und ein gleichmäßiger Fluss der Rohgummimasse in den Schlauch ermöglicht.In a further advantageous embodiment, it is provided that a gear pump is used to generate the high working pressure in the raw rubber mixture. A particular advantage of using a gear pump is that it compensates for the pulsation of the extrusion. The uneven flow of material from the extruder is smoothed by the use of a gear pump and allows a uniform flow of raw rubber mass into the hose.

In einer weiteren vorteilhaften Weiterbildung ist vorgesehen, dass die gesamte Vorrichtung aus Extruder, Zahnradpumpe, Schlauch und Düse in Längs- und Querrichtung bewegbar ist. Dadurch ist es ohne großen Aufwand möglich, die Materialstreifen an einer beliebigen Stelle auf der Reifenkarkasse zu platzieren.In a further advantageous embodiment, it is provided that the entire device of extruder, gear pump, hose and nozzle in the longitudinal and transverse directions is movable. This makes it possible without much effort to place the strips of material anywhere on the tire carcass.

In einer weiteren vorteilhaften Weiterbildung ist vorgesehen, dass die Düse am Schlauch eine schlitzförmige Öffnung aufweist. Dadurch kann ein sehr dünner Materialstreifen erzeugt werden, der z.B. für die genaue Herstellung der Reifenkontur wesentlich ist.In a further advantageous embodiment, it is provided that the nozzle has a slot-shaped opening on the hose. This can produce a very thin strip of material, e.g. essential for the accurate production of the tire contour.

In einer weiteren vorteilhaften Weiterbildung ist vorgesehen, dass die Reifenaufbautrommel ortsfest ist und nur rotatorisch bewegt wird. Dadurch lässt sich der Materialstreifen mit einer hohen Geschwindigkeit auf die Reifenkarkasse aufspulen.In a further advantageous embodiment, it is provided that the tire building drum is stationary and is only moved rotationally. This allows the strip of material to be spooled onto the tire carcass at a high speed.

Es ist vorgesehen, dass der erzeugte Materialstreifen eine Dicke von 0,2 - 1,5mm, vorzugsweise ca. 0,7 mm und eine Breite von 5 - 15mm aufweist. Mit den dünnen Materialstreifen lässt sich die Herstellungsqualität der Fahrzeugreifen wesentlich verbessern.It is envisaged that the produced material strip has a thickness of 0.2-1.5 mm, preferably about 0.7 mm and a width of 5-15 mm. With the thin strips of material, the manufacturing quality of vehicle tires can be significantly improved.

In einer weiteren vorteilhaften Weiterbildung ist vorgesehen, dass die Reifenaufbautrommel einen segmentierten Kern aufweist, wobei der Kern auf seiner Außenseite den Reifenholraum des Reifenrohlings nachbildet. Der segmentierte Kern bietet einen optimalen Halt für die Reifenkarkasse auf die die Materialstreifen aufgespult werden. Denkbar ist auch das spiralförmige Aufwickeln auf einer bombierten Karkasse umzusetzen, die z.B. auf einem Nutspannkopf angeordnet ist.In a further advantageous embodiment, it is provided that the tire building drum has a segmented core, wherein the core simulates the Reifenholraum the green tire on its outside. The segmented core provides optimal support for the tire carcass on the material strips to be wound up. It is also conceivable to implement the helical winding on a cambered carcass, which is arranged for example on a Nutspannkopf.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung werden nun anhand der Zeichnung, die schematisch ein Ausführungsbeispiel darstellt, näher beschrieben. Dabei zeigen:

Fig. 1
die Seitenansicht auf die Vorrichtung aus Extruder, Zahnradpumpe, Schlauch und Düse, angeordnet vor einer Reifenaufbautrommel
Fig. 2
die Aufsicht auf die Vorrichtung aus Extruder, Zahnradpumpe, Schlauch und Düse, angeordnet vor der Reifenaufbautrommel,
Fig. 3
die Aufsicht auf die Vorrichtung aus Extruder, Zahnradpumpe, Schlauch und Düse, angeordnet neben der Reifenaufbautrommel.
Further features, advantages and details of the invention will now be described with reference to the drawing, which schematically illustrates an embodiment. Showing:
Fig. 1
the side view of the device of extruder, gear pump, hose and nozzle, arranged in front of a tire building drum
Fig. 2
the top view of the extruder, gear pump, hose and nozzle device located in front of the tire building drum,
Fig. 3
the top view of the device of extruder, gear pump, hose and nozzle, located next to the tire building drum.

Die Figuren zeigen eine Vorrichtung zum Auftragen von Materialstreifen aus einer unvulkanisierten Rohgummimischung auf einer Reifenaufbautrommel zur Herstellung von Fahrzeugreifen.The figures show a device for applying strips of material from an unvulcanized raw rubber compound on a tire building drum for the production of vehicle tires.

Die Figur 1 zeigt die Vorrichtung in der Seitenansicht. Die Vorrichtung aus Extruder 1, Zahnradpumpe 2, flexiblem Schlauch 3 und Düse 4 ist auf einer Plattform 5 angeordnet. Die Rohgummimasse bzw. Rohgummimischung wird durch einen Extruder 1 bereitgestellt. Vom Extruder 1 wird die Rohgummimasse der Zahnradpumpe 2 zugeführt. Hier wird ein hoher Arbeitsdruck in der Rohgummimischung erzeugt und der durch den Extruder 1 erzeugte ungleichmäßige Materialfluss kompensiert. Durch den hohen Arbeitsdruck wird die Rohgummimasse in einen flexiblen Schlauch 3 gepresst. Über eine Düse 4 wird schließlich ein Materialstreifen erzeugt und auf die sich nur rotatorisch bewegenden Reifenaufbautrommel, auf der bereits vorab eine Reifenkarkasse aufgebracht wurde. Die Reifenkarkasse ist auf einer Reifenaufbautrommel angeordnet, wobei die Reifenaufbautrommel einen segmentierten Kern aufweist, wobei der Kern auf seiner Außenseite den Reifenholraum des Reifenrohlings nachbildet.The FIG. 1 shows the device in side view. The device comprising extruder 1, gear pump 2, flexible hose 3 and nozzle 4 is arranged on a platform 5. The raw rubber compound or crude rubber mixture is provided by an extruder 1. From the extruder 1, the raw rubber mass of the gear pump 2 is supplied. Here, a high working pressure is generated in the raw rubber mixture and the uneven flow of material generated by the extruder 1 compensated. Due to the high working pressure, the raw rubber mass is pressed into a flexible hose 3. Finally, a material strip is produced via a nozzle 4 and onto the tire building drum, which only moves rotationally and on which a tire carcass has already been applied in advance. The tire carcass is disposed on a tire building drum, the tire building drum having a segmented core, wherein the core on its outside mimics the tire cavity of the green tire.

Denkbar ist es, den Schlauch 3 mit dem Gestänge 10 zu halten, welches ebenfalls die Funktion hat den Schlauch 3 in der Horizontalen zu bewegen.It is conceivable to hold the tube 3 with the linkage 10, which also has the function of moving the tube 3 in the horizontal.

Fig. 2 und Fig. 3 zeigen die Vorrichtung zum Aufwickeln von Materialstreifen in der Aufsicht. Durch die gestrichelte Linie wird in der Position 7 die maximale Auslenkung des Schlauches zu beiden Richtungen in der Horizontalen dargestellt, die in der Blattebene liegt. Fig. 2 and Fig. 3 show the device for winding strips of material in the supervision. The dashed line shows in position 7 the maximum deflection of the hose to both directions in the horizontal, which lies in the sheet plane.

In der Fig. 3 wird die Vorrichtung zum Auftragen von Materialstreifen in einer Position dargestellt, die es ermöglicht auch auf die Seiten der Reifenkarkasse Materialstreifen aus Rohgummi aufzutragen. Die Plattform 5 wird dabei in benötigtem Maße in Längs- und Querrichtung X und Y verschoben. Anschließend wird der flexible Schlauch 3 in die gewünschte Position an der Reifenkarkasse 6 gebracht. Durch die Möglichkeit nicht nur die Plattform 5 in ihrer Position zu verändern, sondern auch den Schlauch 3 flexibel anordnen zu können, wird für die komplette Vorrichtung nur ein geringer Bauraum beansprucht. Durch die Kombination aus einer in Längs- und Querrichtung verschiebbaren Plattform 5 und einem flexiblen Schlauch 3 lässt sich durch wenige Positionsänderungen an jeder Stelle auf der Reifenkarkasse entsprechende Reifenaufbauteile aufspulen, z.B. der Apex, der Rim-Strip, die Seitenwand oder der Laufstreifen.In the Fig. 3 the device for applying strips of material is shown in a position which makes it also possible to apply strips of raw rubber to the sides of the tire carcass. The platform 5 is thereby moved to the extent required in the longitudinal and transverse directions X and Y. Subsequently, the flexible hose 3 is brought to the desired position on the tire carcass 6. Due to the possibility not only to change the platform 5 in position, but also to be able to flexibly arrange the hose 3, only a small installation space is required for the complete device. The combination of a longitudinally and transversely displaceable platform 5 and a flexible hose 3 can be achieved by a few Changes in position at each point on the tire carcass to wind up corresponding tire components, such as the apex, the rim strip, the sidewall or the tread.

BezugsziffernlisteReferences list

11
Extruderextruder
22
Zahnradpumpegear pump
33
flexibles Schlauchstückflexible hose piece
44
Düsejet
55
Plattformplatform
66
Reifenkarkasse, die auf einer segmentierten Reifenaufbautrommel angeordnet istTire carcass disposed on a segmented tire building drum
77
Maximale Auslenkung des SchlauchstückesMaximum deflection of the hose piece
88th
Rotationsachse der ReifenaufbautrommelRotation axis of the tire building drum
99
Materialstreifenstrips of material
1010
Gestänge, welches den Schlauch hält und in der Horizontalen in beide Richtungen verfahren werden kannLinkage that holds the hose and can be moved horizontally in both directions
XX
Querrichtungtransversely
YY
Längsrichtunglongitudinal direction

Claims (8)

  1. Method for applying strips of material (9) from an unvulcanized raw rubber mixture to a tyre building drum for producing pneumatic tyres, comprising the following steps:
    a) arranging a tyre carcass (6) on a tyre building drum,
    b) providing a raw rubber mixture for producing the strips of material (9) by an extruder (1),
    c) feeding the raw rubber mixture to a compression device (2) for applying a high working pressure in the material,
    d) pressing the material into a flexible tube (3), at the end of which a nozzle (4) is located, the nozzle (4) being positioned in front of or to the side of the tyre building drum,
    the tube (3) withstanding a working pressure of at least 800 bar,
    the nozzle (4) on the tube having a slit-shaped opening,
    e) spirally winding the material through the nozzle (4) on the tube (3) onto the rotating tyre carcass (6), which is resting on the tyre building drum, the strip of material (9) having a very thin cross-sectional contour as it leaves the nozzle (4), the strip of material (9) produced having a thickness of 0.2 - 1.5 mm and a width of 5 - 15 mm,
    f) processing the tyre blank further by a conventional production process.
  2. Method according to Claim 1, characterized in that the tube (3) with the nozzle (4) can be moved horizontally in both directions in the form of an arc from 0 up to at least 120 degrees, preferably up to 90 degrees.
  3. Method according to one of the preceding claims, characterized in that the tube (3) is provided with a reinforcement, for example of woven metal armouring.
  4. Method according to one of the preceding claims, characterized in that a gear pump (2) is used for producing the high working pressure in the raw rubber mixture.
  5. Method according to one of the preceding claims, characterized in that the entire apparatus comprising the extruder (1), the gear pump (2), the tube (3) and the nozzle (4) is movable in the longitudinal direction and the transverse direction.
  6. Method according to one of the preceding claims, characterized in that the tyre building drum is fixed in place and only moved in a rotary manner.
  7. Method according to one of the preceding claims, characterized in that, with the strip of material (9), the apex, rim-strip, sidewall, base or cap ply is wound onto the tyre carcass (6).
  8. Method according to one of the preceding claims, characterized in that the tyre building drum has a segmented core, the core replicating on its outer side the tyre cavity of the tyre blank.
EP11191861.1A 2011-01-21 2011-12-05 Method for applying strips of material from an unvulcanised raw rubber mixture to a tyre construction drum Active EP2479017B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011000253A DE102011000253A1 (en) 2011-01-21 2011-01-21 Method and device for applying strips of material from an unvulcanized raw rubber compound to a tire building drum

Publications (2)

Publication Number Publication Date
EP2479017A1 EP2479017A1 (en) 2012-07-25
EP2479017B1 true EP2479017B1 (en) 2014-02-26

Family

ID=45217386

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Application Number Title Priority Date Filing Date
EP11191861.1A Active EP2479017B1 (en) 2011-01-21 2011-12-05 Method for applying strips of material from an unvulcanised raw rubber mixture to a tyre construction drum

Country Status (2)

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EP (1) EP2479017B1 (en)
DE (1) DE102011000253A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315469A1 (en) * 1993-05-10 1994-11-17 Ver Glaswerke Gmbh Method and device for extruding a calibrated profile strand from a thermoplastic polymer onto objects
DE29720892U1 (en) * 1997-11-27 1998-02-19 Dekumed Beteiligungsgesellscha Device for heating and applying plastic masses
US6112848A (en) * 1998-09-23 2000-09-05 Chrysler Corporation Sound-dampened automobile interior components and methods for making same
JP4637412B2 (en) * 2001-07-25 2011-02-23 株式会社ブリヂストン Rubber molded body manufacturing method and apparatus
US20040089400A1 (en) * 2002-11-08 2004-05-13 Vargo Richard David Method and apparatus for forming an annular elastomeric tire component
WO2005021643A1 (en) * 2003-08-29 2005-03-10 Advanced Elastomer Systems, L.P. Manufacturing of shaped coolant hoses
US9701081B2 (en) * 2009-12-23 2017-07-11 The Goodyear Tire & Rubber Company Method for forming stratified rubber article with variable cure rate

Also Published As

Publication number Publication date
EP2479017A1 (en) 2012-07-25
DE102011000253A1 (en) 2012-07-26

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